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PracticeExam2question1.docx

Using the photo that shows results of various biochemical tests determine the answer to the following questions by inputting the answers in order in the ten boxes below:

Gram reaction

shape

MR

VP

PAD

sulfur

indole

motility

citrate

Genus and species (put this in the last box)

Using the table identify the Genus and species of the unknown bacteria:

Organism

Gram

Shape

Arrangement

MR

VP

PAD

H2S

indole

motility

citrate

Staphylococcus aureus

+

circle

clusters

+

+

-

-

-

-

 

Bacillus megaterium

+

rod

chains

+

-

-

-

-

+

+

Bacillus cereus

+

rod

chains

-

+

-

-

-

+

+

Micrococcus luteus

+

circle

tetrad

-

-

-

-

-

-

 

 

 

 

 

 

 

 

 

 

 

 

Moraxella catarrhalis

-

cocci

diplococci

-

-

-

-

-

-

+

Enterobacter aerogenes

-

rod

single

-

+

-

-

-

+

+

Proteus vulgaris

-

rod

pairs, chains

+

-

+

+

-

+

-

Providencia stuartii

-

rod

coccobaccilli

+

-

+

-

+

+

+

Alcaligenes faecalis

-

rod

single, pairs

-

-

-

-

-

+

+

Citrobacter freundii

-

rod

pairs, chains

+

-

-

+

-

+

+

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